Numerical and experimental study on the aerodynamic force coefficients of railway vehicles on an embankment in crosswind

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Numerical and experimental study on the aerodynamic force coefficients of railway vehicles on an embankment in crosswind. / Noguchi, Yuhei; Suzuki, Minoru; Baker, Chris; Nakade, Koji.

In: Journal of Wind Engineering and Industrial Aerodynamics, Vol. 184, 01.01.2019, p. 90-105.

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@article{93e5d9bc9ba940e0a31a718089f32ef4,
title = "Numerical and experimental study on the aerodynamic force coefficients of railway vehicles on an embankment in crosswind",
abstract = "It is necessary to obtain the aerodynamic force coefficients of the train on the embankment for the assessment of the running safety in a crosswind. In general, wind tunnel tests are conducted using the static train model on the embankment model. In this paper, the influence of the airflow condition and the distance from the upstream end of the embankment model to the train model on the aerodynamic force coefficients is investigated. In the wind tunnel tests, the side force coefficients (CS) reached their maximum values at a yaw angle of 50° in smooth flow while they reached their maximum values at a yaw angle of 90° in atmospheric boundary layer (ABL) flow. Large-eddy simulation (LES) was made on the flow around the train model on the embankment, and it was found that CS became larger as the upstream embankment length became smaller owing to the vortex generated near the upstream end of the embankment at the yaw angle of 50°. LES on the flow around the embankment model showed that the distance over which the flow field was affected by this vortex was 16 times the height of the embankment model in smooth flow, and it was 12 times in ABL flow at the yaw angle of 50°.",
keywords = "Wind tunnel tests, Embankment scenario, CFD simulation, LES and train aerodynamics",
author = "Yuhei Noguchi and Minoru Suzuki and Chris Baker and Koji Nakade",
year = "2019",
month = jan,
day = "1",
doi = "10.1016/j.jweia.2018.11.019",
language = "English",
volume = "184",
pages = "90--105",
journal = "Journal of Wind Engineering and Industrial Aerodynamics",
issn = "0167-6105",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Numerical and experimental study on the aerodynamic force coefficients of railway vehicles on an embankment in crosswind

AU - Noguchi, Yuhei

AU - Suzuki, Minoru

AU - Baker, Chris

AU - Nakade, Koji

PY - 2019/1/1

Y1 - 2019/1/1

N2 - It is necessary to obtain the aerodynamic force coefficients of the train on the embankment for the assessment of the running safety in a crosswind. In general, wind tunnel tests are conducted using the static train model on the embankment model. In this paper, the influence of the airflow condition and the distance from the upstream end of the embankment model to the train model on the aerodynamic force coefficients is investigated. In the wind tunnel tests, the side force coefficients (CS) reached their maximum values at a yaw angle of 50° in smooth flow while they reached their maximum values at a yaw angle of 90° in atmospheric boundary layer (ABL) flow. Large-eddy simulation (LES) was made on the flow around the train model on the embankment, and it was found that CS became larger as the upstream embankment length became smaller owing to the vortex generated near the upstream end of the embankment at the yaw angle of 50°. LES on the flow around the embankment model showed that the distance over which the flow field was affected by this vortex was 16 times the height of the embankment model in smooth flow, and it was 12 times in ABL flow at the yaw angle of 50°.

AB - It is necessary to obtain the aerodynamic force coefficients of the train on the embankment for the assessment of the running safety in a crosswind. In general, wind tunnel tests are conducted using the static train model on the embankment model. In this paper, the influence of the airflow condition and the distance from the upstream end of the embankment model to the train model on the aerodynamic force coefficients is investigated. In the wind tunnel tests, the side force coefficients (CS) reached their maximum values at a yaw angle of 50° in smooth flow while they reached their maximum values at a yaw angle of 90° in atmospheric boundary layer (ABL) flow. Large-eddy simulation (LES) was made on the flow around the train model on the embankment, and it was found that CS became larger as the upstream embankment length became smaller owing to the vortex generated near the upstream end of the embankment at the yaw angle of 50°. LES on the flow around the embankment model showed that the distance over which the flow field was affected by this vortex was 16 times the height of the embankment model in smooth flow, and it was 12 times in ABL flow at the yaw angle of 50°.

KW - Wind tunnel tests

KW - Embankment scenario

KW - CFD simulation

KW - LES and train aerodynamics

U2 - 10.1016/j.jweia.2018.11.019

DO - 10.1016/j.jweia.2018.11.019

M3 - Article

VL - 184

SP - 90

EP - 105

JO - Journal of Wind Engineering and Industrial Aerodynamics

JF - Journal of Wind Engineering and Industrial Aerodynamics

SN - 0167-6105

ER -